@article{BSL8_3_Arruda_Alves1,
author = {Ayda I. ARRUDA and El{\'{\i}}as H. ALVES},
title = {Some Remarks on the Logic of Vagueness},
journal = {Bulletin of the Section of Logic},
volume = {8},
number = {3},
year = {1979},
pages = {133--138}
}